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e674a49a CB |
1 | /* |
2 | * bootloader support | |
3 | * | |
4 | * Copyright IBM, Corp. 2012 | |
5 | * | |
6 | * Authors: | |
7 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2 or (at your | |
10 | * option) any later version. See the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
9615495a | 14 | #include "qemu/osdep.h" |
da34e65c | 15 | #include "qapi/error.h" |
e674a49a CB |
16 | #include "sysemu/sysemu.h" |
17 | #include "cpu.h" | |
18 | #include "elf.h" | |
19 | #include "hw/loader.h" | |
ba1509c0 DD |
20 | #include "hw/s390x/virtio-ccw.h" |
21 | #include "hw/s390x/css.h" | |
df75a4e2 | 22 | #include "ipl.h" |
e674a49a CB |
23 | |
24 | #define KERN_IMAGE_START 0x010000UL | |
25 | #define KERN_PARM_AREA 0x010480UL | |
26 | #define INITRD_START 0x800000UL | |
27 | #define INITRD_PARM_START 0x010408UL | |
28 | #define INITRD_PARM_SIZE 0x010410UL | |
29 | #define PARMFILE_START 0x001000UL | |
e674a49a CB |
30 | #define ZIPL_IMAGE_START 0x009000UL |
31 | #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64) | |
32 | ||
04ca4b92 AY |
33 | static bool iplb_extended_needed(void *opaque) |
34 | { | |
35 | S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL)); | |
36 | ||
37 | return ipl->iplbext_migration; | |
38 | } | |
39 | ||
40 | static const VMStateDescription vmstate_iplb_extended = { | |
41 | .name = "ipl/iplb_extended", | |
42 | .version_id = 0, | |
43 | .minimum_version_id = 0, | |
44 | .needed = iplb_extended_needed, | |
45 | .fields = (VMStateField[]) { | |
46 | VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200), | |
47 | VMSTATE_END_OF_LIST() | |
48 | } | |
49 | }; | |
50 | ||
2e13fbe4 FZ |
51 | static const VMStateDescription vmstate_iplb = { |
52 | .name = "ipl/iplb", | |
53 | .version_id = 0, | |
54 | .minimum_version_id = 0, | |
55 | .fields = (VMStateField[]) { | |
56 | VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110), | |
57 | VMSTATE_UINT16(devno, IplParameterBlock), | |
58 | VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88), | |
59 | VMSTATE_END_OF_LIST() | |
04ca4b92 AY |
60 | }, |
61 | .subsections = (const VMStateDescription*[]) { | |
62 | &vmstate_iplb_extended, | |
63 | NULL | |
2e13fbe4 FZ |
64 | } |
65 | }; | |
66 | ||
67 | static const VMStateDescription vmstate_ipl = { | |
68 | .name = "ipl", | |
69 | .version_id = 0, | |
70 | .minimum_version_id = 0, | |
71 | .fields = (VMStateField[]) { | |
bb099546 DH |
72 | VMSTATE_UINT64(compat_start_addr, S390IPLState), |
73 | VMSTATE_UINT64(compat_bios_start_addr, S390IPLState), | |
2e13fbe4 FZ |
74 | VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock), |
75 | VMSTATE_BOOL(iplb_valid, S390IPLState), | |
76 | VMSTATE_UINT8(cssid, S390IPLState), | |
77 | VMSTATE_UINT8(ssid, S390IPLState), | |
78 | VMSTATE_UINT16(devno, S390IPLState), | |
79 | VMSTATE_END_OF_LIST() | |
80 | } | |
81 | }; | |
e674a49a | 82 | |
feacc6c2 DH |
83 | static S390IPLState *get_ipl_device(void) |
84 | { | |
85 | return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL)); | |
86 | } | |
87 | ||
d884c86d TH |
88 | static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr) |
89 | { | |
90 | uint64_t dstaddr = *(uint64_t *) opaque; | |
91 | /* | |
92 | * Assuming that our s390-ccw.img was linked for starting at address 0, | |
93 | * we can simply add the destination address for the final location | |
94 | */ | |
95 | return srcaddr + dstaddr; | |
96 | } | |
97 | ||
04fccf10 | 98 | static void s390_ipl_realize(DeviceState *dev, Error **errp) |
e674a49a CB |
99 | { |
100 | S390IPLState *ipl = S390_IPL(dev); | |
7691993c | 101 | uint64_t pentry = KERN_IMAGE_START; |
376827d4 | 102 | int kernel_size; |
e6da780d | 103 | Error *err = NULL; |
e674a49a | 104 | |
f0180f91 FZ |
105 | int bios_size; |
106 | char *bios_filename; | |
e674a49a | 107 | |
f0180f91 FZ |
108 | /* |
109 | * Always load the bios if it was enforced, | |
110 | * even if an external kernel has been defined. | |
111 | */ | |
112 | if (!ipl->kernel || ipl->enforce_bios) { | |
d884c86d TH |
113 | uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL; |
114 | ||
e674a49a | 115 | if (bios_name == NULL) { |
d0249ce5 | 116 | bios_name = ipl->firmware; |
e674a49a CB |
117 | } |
118 | ||
119 | bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); | |
1f7de853 | 120 | if (bios_filename == NULL) { |
e6da780d | 121 | error_setg(&err, "could not find stage1 bootloader"); |
8f04e88e | 122 | goto error; |
1f7de853 DD |
123 | } |
124 | ||
d884c86d TH |
125 | bios_size = load_elf(bios_filename, bios_translate_addr, &fwbase, |
126 | &ipl->bios_start_addr, NULL, NULL, 1, | |
7ef295ea | 127 | EM_S390, 0, 0); |
d884c86d TH |
128 | if (bios_size > 0) { |
129 | /* Adjust ELF start address to final location */ | |
130 | ipl->bios_start_addr += fwbase; | |
131 | } else { | |
f35c1f66 | 132 | /* Try to load non-ELF file */ |
33259956 AG |
133 | bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, |
134 | 4096); | |
f0180f91 | 135 | ipl->bios_start_addr = ZIPL_IMAGE_START; |
33259956 | 136 | } |
e674a49a CB |
137 | g_free(bios_filename); |
138 | ||
376827d4 | 139 | if (bios_size == -1) { |
e6da780d | 140 | error_setg(&err, "could not load bootloader '%s'", bios_name); |
8f04e88e | 141 | goto error; |
e674a49a | 142 | } |
7691993c | 143 | |
f0180f91 FZ |
144 | /* default boot target is the bios */ |
145 | ipl->start_addr = ipl->bios_start_addr; | |
e674a49a | 146 | } |
7691993c | 147 | |
f0180f91 FZ |
148 | if (ipl->kernel) { |
149 | kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL, | |
7ef295ea | 150 | NULL, 1, EM_S390, 0, 0); |
f0180f91 FZ |
151 | if (kernel_size < 0) { |
152 | kernel_size = load_image_targphys(ipl->kernel, 0, ram_size); | |
153 | } | |
154 | if (kernel_size < 0) { | |
e6da780d | 155 | error_setg(&err, "could not load kernel '%s'", ipl->kernel); |
8f04e88e | 156 | goto error; |
e674a49a | 157 | } |
f0180f91 FZ |
158 | /* |
159 | * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the | |
160 | * kernel parameters here as well. Note: For old kernels (up to 3.2) | |
161 | * we can not rely on the ELF entry point - it was 0x800 (the SALIPL | |
162 | * loader) and it won't work. For this case we force it to 0x10000, too. | |
163 | */ | |
164 | if (pentry == KERN_IMAGE_START || pentry == 0x800) { | |
165 | ipl->start_addr = KERN_IMAGE_START; | |
166 | /* Overwrite parameters in the kernel image, which are "rom" */ | |
167 | strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline); | |
168 | } else { | |
169 | ipl->start_addr = pentry; | |
e674a49a CB |
170 | } |
171 | ||
f0180f91 FZ |
172 | if (ipl->initrd) { |
173 | ram_addr_t initrd_offset; | |
174 | int initrd_size; | |
175 | ||
176 | initrd_offset = INITRD_START; | |
177 | while (kernel_size + 0x100000 > initrd_offset) { | |
178 | initrd_offset += 0x100000; | |
179 | } | |
180 | initrd_size = load_image_targphys(ipl->initrd, initrd_offset, | |
181 | ram_size - initrd_offset); | |
182 | if (initrd_size == -1) { | |
e6da780d | 183 | error_setg(&err, "could not load initrd '%s'", ipl->initrd); |
8f04e88e | 184 | goto error; |
f0180f91 | 185 | } |
e674a49a | 186 | |
f0180f91 FZ |
187 | /* |
188 | * we have to overwrite values in the kernel image, | |
189 | * which are "rom" | |
190 | */ | |
191 | stq_p(rom_ptr(INITRD_PARM_START), initrd_offset); | |
192 | stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size); | |
193 | } | |
194 | } | |
bb099546 DH |
195 | /* |
196 | * Don't ever use the migrated values, they could come from a different | |
197 | * BIOS and therefore don't work. But still migrate the values, so | |
198 | * QEMUs relying on it don't break. | |
199 | */ | |
200 | ipl->compat_start_addr = ipl->start_addr; | |
201 | ipl->compat_bios_start_addr = ipl->bios_start_addr; | |
04fccf10 | 202 | qemu_register_reset(qdev_reset_all_fn, dev); |
8f04e88e | 203 | error: |
e6da780d | 204 | error_propagate(errp, err); |
e674a49a CB |
205 | } |
206 | ||
207 | static Property s390_ipl_properties[] = { | |
208 | DEFINE_PROP_STRING("kernel", S390IPLState, kernel), | |
209 | DEFINE_PROP_STRING("initrd", S390IPLState, initrd), | |
210 | DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), | |
d0249ce5 | 211 | DEFINE_PROP_STRING("firmware", S390IPLState, firmware), |
f0180f91 | 212 | DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false), |
04ca4b92 AY |
213 | DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration, |
214 | true), | |
e674a49a CB |
215 | DEFINE_PROP_END_OF_LIST(), |
216 | }; | |
217 | ||
010d45d2 | 218 | static bool s390_gen_initial_iplb(S390IPLState *ipl) |
df75a4e2 FZ |
219 | { |
220 | DeviceState *dev_st; | |
221 | ||
df75a4e2 FZ |
222 | dev_st = get_boot_device(0); |
223 | if (dev_st) { | |
b804e8a6 JL |
224 | VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *) |
225 | object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent), | |
df75a4e2 | 226 | TYPE_VIRTIO_CCW_DEVICE); |
e468b673 AY |
227 | SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st), |
228 | TYPE_SCSI_DEVICE); | |
b804e8a6 JL |
229 | if (virtio_ccw_dev) { |
230 | CcwDevice *ccw_dev = CCW_DEVICE(virtio_ccw_dev); | |
231 | ||
6aed9589 AY |
232 | ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); |
233 | ipl->iplb.blk0_len = | |
234 | cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN); | |
235 | ipl->iplb.pbt = S390_IPL_TYPE_CCW; | |
236 | ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno); | |
3041e3be | 237 | ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3; |
010d45d2 | 238 | return true; |
e468b673 AY |
239 | } else if (sd) { |
240 | SCSIBus *bus = scsi_bus_from_device(sd); | |
241 | VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus); | |
242 | VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw, vdev); | |
b804e8a6 | 243 | CcwDevice *ccw_dev = CCW_DEVICE(scsi_ccw); |
e468b673 AY |
244 | |
245 | ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN); | |
246 | ipl->iplb.blk0_len = | |
247 | cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN); | |
248 | ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI; | |
249 | ipl->iplb.scsi.lun = cpu_to_be32(sd->lun); | |
250 | ipl->iplb.scsi.target = cpu_to_be16(sd->id); | |
251 | ipl->iplb.scsi.channel = cpu_to_be16(sd->channel); | |
b804e8a6 JL |
252 | ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno); |
253 | ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3; | |
e468b673 | 254 | return true; |
df75a4e2 FZ |
255 | } |
256 | } | |
257 | ||
010d45d2 | 258 | return false; |
df75a4e2 FZ |
259 | } |
260 | ||
feacc6c2 | 261 | void s390_ipl_update_diag308(IplParameterBlock *iplb) |
df75a4e2 | 262 | { |
feacc6c2 | 263 | S390IPLState *ipl = get_ipl_device(); |
df75a4e2 | 264 | |
feacc6c2 DH |
265 | ipl->iplb = *iplb; |
266 | ipl->iplb_valid = true; | |
df75a4e2 FZ |
267 | } |
268 | ||
269 | IplParameterBlock *s390_ipl_get_iplb(void) | |
270 | { | |
feacc6c2 | 271 | S390IPLState *ipl = get_ipl_device(); |
df75a4e2 | 272 | |
feacc6c2 | 273 | if (!ipl->iplb_valid) { |
df75a4e2 FZ |
274 | return NULL; |
275 | } | |
276 | return &ipl->iplb; | |
277 | } | |
278 | ||
e91e972c FZ |
279 | void s390_reipl_request(void) |
280 | { | |
feacc6c2 | 281 | S390IPLState *ipl = get_ipl_device(); |
e91e972c | 282 | |
e91e972c FZ |
283 | ipl->reipl_requested = true; |
284 | qemu_system_reset_request(); | |
285 | } | |
286 | ||
db3b2566 DH |
287 | void s390_ipl_prepare_cpu(S390CPU *cpu) |
288 | { | |
289 | S390IPLState *ipl = get_ipl_device(); | |
290 | ||
291 | cpu->env.psw.addr = ipl->start_addr; | |
292 | cpu->env.psw.mask = IPL_PSW_MASK; | |
293 | ||
294 | if (!ipl->kernel || ipl->iplb_valid) { | |
295 | cpu->env.psw.addr = ipl->bios_start_addr; | |
010d45d2 AY |
296 | if (!ipl->iplb_valid) { |
297 | ipl->iplb_valid = s390_gen_initial_iplb(ipl); | |
298 | } | |
db3b2566 DH |
299 | } |
300 | } | |
301 | ||
e674a49a CB |
302 | static void s390_ipl_reset(DeviceState *dev) |
303 | { | |
304 | S390IPLState *ipl = S390_IPL(dev); | |
ba1509c0 | 305 | |
e91e972c FZ |
306 | if (!ipl->reipl_requested) { |
307 | ipl->iplb_valid = false; | |
6aed9589 | 308 | memset(&ipl->iplb, 0, sizeof(IplParameterBlock)); |
e91e972c FZ |
309 | } |
310 | ipl->reipl_requested = false; | |
e674a49a CB |
311 | } |
312 | ||
313 | static void s390_ipl_class_init(ObjectClass *klass, void *data) | |
314 | { | |
315 | DeviceClass *dc = DEVICE_CLASS(klass); | |
e674a49a | 316 | |
04fccf10 | 317 | dc->realize = s390_ipl_realize; |
e674a49a CB |
318 | dc->props = s390_ipl_properties; |
319 | dc->reset = s390_ipl_reset; | |
2e13fbe4 | 320 | dc->vmsd = &vmstate_ipl; |
b4ab4572 | 321 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
e674a49a CB |
322 | } |
323 | ||
49973ebc | 324 | static const TypeInfo s390_ipl_info = { |
e674a49a | 325 | .class_init = s390_ipl_class_init, |
04fccf10 DH |
326 | .parent = TYPE_DEVICE, |
327 | .name = TYPE_S390_IPL, | |
e674a49a CB |
328 | .instance_size = sizeof(S390IPLState), |
329 | }; | |
330 | ||
331 | static void s390_ipl_register_types(void) | |
332 | { | |
333 | type_register_static(&s390_ipl_info); | |
334 | } | |
335 | ||
336 | type_init(s390_ipl_register_types) |